Description
sized for elementary lessons on area
and a storage box
used for image-formation and focal-length teaching at physics workstations
supplying the strongest field of the Alnico horseshoe series for visible attraction-distance demos
Phenol Red Lactose Differential Medium Material_Cork sized for elementary lessons onPhenol red indicator shifts yellow when bacteria ferment lactose to acid, supporting differential identification of coliform and lactose fermenting species.
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